/*
 * $Id: HheaWriter.java,v 1.5 2004/09/26 09:15:48 eed3si9n Exp $
 * 
 * $Copyright: copyright (c) 2003, e.e d3si9n $
 * $License: 
 * This source code is part of DoubleType.
 * DoubleType is a graphical typeface designer.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This Program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * In addition, as a special exception, e.e d3si9n gives permission to
 * link the code of this program with any Java Platform that is available
 * to public with free of charge, including but not limited to
 * Sun Microsystem's JAVA(TM) 2 RUNTIME ENVIRONMENT (J2RE),
 * and distribute linked combinations including the two.
 * You must obey the GNU General Public License in all respects for all 
 * of the code used other than Java Platform. If you modify this file, 
 * you may extend this exception to your version of the file, but you are not
 * obligated to do so. If you do not wish to do so, delete this exception
 * statement from your version.
 * $
 */
 
 
package org.doubletype.ossa.truetype;

import java.io.*;

/**
 * HheaWriter depends on HtmxWriter.
 * @author e.e
 */
public class HheaWriter extends FontFormatWriter {	
    private GlyfWriter m_glyf;
    private HeadWriter m_head;
    
	private int m_lineGap = 0;
	private int m_maxAdvanceWidth = 0;
	private int m_minRightSideBearing = 0;
	
	public HheaWriter(GlyfWriter a_glyf, HeadWriter a_head) {
		super();
		
		m_glyf = a_glyf;
		m_head = a_head;
	}
	
	public void setLineGap(int a_value) {
	    m_lineGap = a_value;
	}
	
	public void setMaxAdvanceWidth(int a_value) {
	    m_maxAdvanceWidth = a_value;
	}
	
	public void setMinRightSideBearing(int a_value) {
		m_minRightSideBearing = a_value;
	}
	
	public void write() throws IOException {
	    // table version number
		writeFixed32(1.0);
		
		writeFWord(m_head.getMax().y);
		writeFWord(m_head.getMin().y);
		writeFWord(m_lineGap);
		writeUFWord(m_maxAdvanceWidth);
		
		int minLeftSideBearing = m_head.getMin().x;
		writeFWord(minLeftSideBearing);
		writeFWord(m_minRightSideBearing);
		
		int xMaxExtent = m_head.getMax().x - m_head.getMin().x;
		writeFWord(xMaxExtent);
		
		// caratSlopeRise
		writeInt16(1);
		writeInt16(0);
		
		// reserved
		for (int i = 0; i < 5; i++) {
			writeInt16(0);
		} // for i
		
		writeInt16(0);
		
		int numOfHMetrics = m_glyf.numOfGlyph();
		writeUInt16(numOfHMetrics);
		
		pad();
	}
	
	protected String getTag() {
		return "hhea";
	}
}
